The rings are numerous in number and seem to have been placed in a pattern of some kind as illustrated by 3D projections of the cave. This proves that the Neanderthals were actually intelligent enough to construct structures.
The cave is also quite deep. Researchers previously believed that Neanderthals were afraid to go deep into caves due to lack of light. However, the Bruniquel Cave is over 1000 feet deep. The Neanderthals seem to have created a home in this deep cave.
"What is most surprising to me is that this discovery is showing that Neanderthals ventured underground and far away from any source of natural light," says Soressi and archaeologist on the site. "I think we have by now many different lines of evidence to show that Neanderthals, and even Neanderthals 200,000 years ago, had cognitive abilities not so different from our direct ancestors."
In the deep cave, there is evidence of burnt stalagmites at the center of the cave. Scientists believe that this may have been a fireplace for the early humanoids. They also seem to have created fire torches from bone pieces. The soft fatty tissue at the end of bones may have acted as a fuel to keep the flame burning.